About Sarnia Roads and Traffic The business of achieving and maintaining the highest standards around the maintenance of our road, bridge, sidewalk and drainage infrastructure […] Learn More Oversize/Overweight Loads Please refer to Oversize/Overweight Permit attachment for details regarding loads passing through the City of Sarnia. This file contains information […] Learn More Pothole, Sidewalk, Curb and Gutter Repairs Causes of Potholes Potholes are created when water penetrates the top layer of asphalt through cracks in the road. After […] Learn More Snow and Ice Removal Jump to: Ice Removal Snow Removal When does the City plow? The City plows when snow accumulation reaches 8 centimeters […] Learn More Private: Report a Pothole The City relies on resident reports to identify areas in need of repair. Report road problems such as potholes and […] Learn More Transportation Master Plan The Transportation Master Plan (TMP) is a long range citywide planning document for the City’s transportation infrastructure that:•Projects future travel […] Learn More